matrixcalc (version 1.0-3)

matrix.trace: The trace of a matrix

Description

This function returns the trace of a given square numeric matrix.

Usage

matrix.trace(x)

Arguments

x

a matrix

Value

A numeric value which is the sum of the values on the diagonal.

References

Bellman, R. (1987). Matrix Analysis, Second edition, Classics in Applied Mathematics, Society for Industrial and Applied Mathematics.

Examples

# NOT RUN {
A <- matrix( seq( 1, 16, 1 ), nrow=4, byrow=TRUE )
matrix.trace( A )
# }